Improvement in hub-borers



` E. cAsWELL.

HUB-BORERS.

No. 194,290. ,Paltenged Aug. '21,1877.

STATES j PATENT OFFICEQQ ZRA CASWELL l'OF LYONS, NEW YORK.

Specification' forming part of Letters Patent No. 194,290, dated August21, 1877 applicationlled l December 1 1, 1876. j

Figure l'is alsectionalelevation. `Fig.2 is

a cross-setion in line .fr x of Fig. l, showing the apparatus attachedto a wheel. Figs. 3, 4,` and 5 are detail views.

My improvement relates to an apparatus forboring hubs, in which themachineis clamped to the wheel, and the cutter is turned by hand.

The invention consists in the construction and arrangement of partshereinafter more fully described and definitely claimed.

Arepresents theframe or bench upon which the wheel is mounted. B is thewheel. C is a socket, lthrough which passes the screw-shaft D. Thissocket is connected by curved arms a a with a ring, E. G is aring'similar to E, located below the same, and H is a packing'- ring, ofleather or other soft material, which fits the bottom of ring. G. Theopening in these rings is large enough toreceive hubs of all sizes.

The lower ring G has slotted lugs b b, which project upward and embracethe upper ring E, thereby keeping the two centered and in properposition. Through the slots of these lugs pass bolts c c, having blocksd d at the bottom and nuts f f at the top. The blocks d d rest below thespokes g g of the wheel, while the bolts c c pass between the spokes. Bythis means the ring G is clamped fast on top of the wheel, and thepacking-ring H, resting between said ring and the spokes, prevents anybruising of the latter. The wheel is then laid on top of the bench A,and the screwshaft D is turned, which feeds the cutter h through thehub, as usual.

The upper ring E is attached to the ring G by bolts and nuts it, thebolts passing through rubber packings k k, which are interposed betweensaid rings, and serve to keep them some distance apart, as shown mostclearly in Fig.

3. The same bolts and nuts also secure the vand centered upon the wheel,these gages are `moved. in,like a chuck, to `bear against the end of the1hub,.thereby keeping it in place, as

shown in Fig. 2. They prevent the displace ment that might occur understrain.

on m are adjustingscrews, which passthrough the upper `ring E atintervals, andv bear upon the lower ring G. If desired, they maylie inthe same radial line with the bolts c' i, and pass through the slots ofthe gages l l. They are intended to act in conjunctionwith the bolts z'i and packings 7c kin producing proper adjustmentiot'rthe machine, toplumb the cutter to the hub. VThis is vdone by turning upone set andletting out theotherset of bolts or screws, the packings taking up theslack. By this means a very accurate adjustment may be attained, andthere will be no loose-? ness between the rings E G, the packings alwaysholdiug them tight. Thesepackings are essential in such a constructionof the apparatus.

I is a circular bearing or nut, which rests and turns loosely in thesocket C. The lower end is threaded internally, to receive thescrewshaft D. The bearing or nut has a shoulder or head, a, at the top,which bears on top the socket G, and prevents the nut from fallingthrough.

o is a set-screw, which passes through the the head n, and bears againstthe screw-shaft D. p is a corresponding set-screw, which passes throughthe socket G, and bears against the nut I. The latter has acircumferential groove, q, in line with the set-screw, into which saidscrew strikes.

In the act of boring, the screw p is set up against the nut l, to holdthe same stationary, andthe screw o is loosened, as shown in Fig. 1.This allows the screw-shaft to feed down through the nut or bearing asit is revolved. But when the screw o is set up against the screw-shaft,and the screw p is loosened, it will be seen that the screw-shaft andnut will turn together as one fixture, and the screwshaft will not feeddown, but will simply revolve in a horizontal plane, in which case the lcutter will ream and smooth the bore, formlsocket C, but also especiallyin truing the wheel preparatory to boring. In such case the apparatus,with the wheel mounted, is placed horizontally, and the Whole isrevolved upon the nut I as a pivot. The end of the screw p fittingwithin the groove q, prevents the apparatus from running off the nut,and also holds it in an exact position as it is revolved, so that therim of the wheel will run in an exact plane in truing. A tram may alsobe used, in truing the Wheel, having an arm with a pin which ts to therim, and will t all points when the wheel isproperly centered.

I employ in boring hubs three different screw-shafts, D, havingdifferent-sized cutters. The first is for cutting the center hole fromend to end. The second is for making the enlargement in the `interior ofthe hub. The third is for making the shoulder at the end ot' the hub toreceive the auge of the box. They are also adapted to light or heavyWork. The nuts I, however, are all of the same size to t the socket C,hence the change from one to another is made without trouble.

Y K, Fig. 5, is a tester for truing the machine to the hub, and forcentering the latter. 1t is an obtuse-angled arm or elbow, attached inthe cutter-socket of the screw-shaft, and projecting down around the endof the hub. vThe screw-shaft is secured to the nut so as not to feeddown, as before described, and the tester is then swung around thecircle, and when all points touch the hub the latter is properlycentered. The angle or bevel of the tester is essential to adapt it todifferent-sized hubs. The screw-shaft is simply turned up or down tomake the incline fit the different sizes. The groove q, beforedescribed, is also essential in .this connection, to prevent the testerfrom Wabbling as it is turned, as great accuracy is required.

Having thus described my invention, what I claim as new is- 1. In ahub-boring machine, the two rings E G, the packing-ring H, the gages ll, the adjusting-screws z' m, and the packings 7c k, combined to operateas and for the purpose specied.

2. In a hub-boring machine, the combination, with the screw-shaft D andthe socket C, connectedl with the ring E by supporting-arms a a, of thenut I, provided with a head, n, resting on top of the said socket, and acircumferential groove, q, for the reception of the screw p, as shownand described, and .for the purpose specied.

In witness whereof I have hereunto signed my name in the presence of twosubscribing Witnesses.

EZRA GASWELL.

Witnesses:

R. F. OsGooD, EDWIN Soo'r'r.

